Concrete placement machine



March 14, 1939. C, JACKSON' 2,150,325

' CONCRETE PLACEMENT MACHINE Filed Jan. lO, 1936 3 Sheets-Sheet 1y INVENTOR.

60m/1W Jac/mon wg@ ATTORNEYS March 14, 1939. c. JACKSON 2,150,325

CONCRETE PLACEMENT MACHINE v Filed Ja'n. lO, 1936 v 3 Sheets-Sheet 2 q 1 N VENTOR: 60H0/ cfm/rdm @/A @WMM ATTORNEYS March 14, 1939. C JACKSON CONCRETE PLACEMENT MACHINE Filed Jan. 10,1956 3 Sheets-Sheet 3 M50 logt nmA INVENTOR amy/w wcm;

ATTORNEYS @MJ WMM Patented Mar. `14, 19.39

vUNITED ASTATES PATENT oI-Flce 12 Qlaims. (Cl. 94-48) This invention relates to improvements in concrete placement machines.

The main objects of this invention are:

First, to provide a machine for the placement of concrete such as pavements for the walls of concrete ditches or conduits, which is of very M large capaeityand high eiciency in the rapid and effective placement of concrete masses having very low water content.

Second, to provide a machine of this character, which` permits the effective placement and simultaneous nishi'ng of the surface'of the concrete. Third, to provide a machine having these advantages, which may be effectively operated by comparatively unskilled labor.

Fourth, to provide a method of placing concrete slabs or pavements, which resultsjina very superior product.

Fifth, to provide an apparatus for the place- 20 ment of concrete, which is capable of effective operation under a wide range of conditions.

Sixth, to provide a structure having these advantages, which is comparatively simple and economical and very durable.

Further objects relating to details and economies of my invention will definitely appear from the description to follow. The invention is defined' in the claims.

Preferred embodiments of my invention are illustrated in the accompanying drawings, where- 1n: a.

Fig. l is a fragmentary plan view of a machine embodying the features of my invention, parts be# ing shown in conventional form and the machinebeing shown in operative relation to`forms which constitute a track therefor.

, Fig. 2 is a fragmentary side elevation.

Fig. 3 is a front elevation, the'forms and cornpleted pavement or slab beingshown in section.

Fig. lis an enlarged fragmentary view partially in section on line 4-w-4 of Fig. 1, showing details of the mounting for the vibratory element.

Fig. 5 is a detail view partially in section on line 5-5 of Fig. 6, showing details of one form of vibratory element.

Fig.v 6 is a transverse section on line 6 6 of Fig. 5.A

Fig. 7 is a detail view of the vibratory element in section on line 'I-1 of Fig. 3.

,-,0 Figs. 8 to l2, inclusive, are fragmentary views I illustrating operative conditions and several possible adjustments of the vibratory element relativeto the screed, the impulses of the vibratory element in the concrete mass being indicated by 55 dotted lines.

Fig. i3 is a fragmentary View partially in side elevation and partially in section, illustrating a modified form or embodiment of my machine or apparatus.'

Fig. 14 is a fragmentary front perspective view,

the-forms and a portion of the vibratory element being sectioned.

In the accompanying drawings, I, I represent the forms of a pavement or thelike, the forms being adapted as tracks for the support of the machine. In the embodiment illustrated., I provide a suitable carriage frame 2 shown mainly in conventional form with wheels 3 preferably flanged and adapted .to travel on the forms.

At the front of the carriage, I mount a screed 4, this screed being provided with a face plate 5 of substantial height and a shoe or bottom portion 6. A beam 1 is disposed longitudinally on the shoe and is engaged by the hangers 8 for reciproyfcatingly supporting the screed. As the carriage advances, the screed is horizontally reciprocated, pitman 9 being illustrated as connecting means for the screed tothe transmission designated generally by the numeral I0, a suitable engine or motor being indlcated'at II. The screed projects beyond the forms, is adaptedtorest lthereon asl it is reciprocated, and is provided with forwardly diverging wings I2.

In advance of the screed, but inoperative relation thereto, lI mount a vibratory element I3, this vbeing preferably tubular and of cylindrical cross section and also of such diameter that it may be submerged in the mass of'concrete indicated at I4, which is pushed along or accumulating in 'front of the screed. This vibratory element is adjustably supported for vertical adjustment and also, for horizontal adjustment relative to the screed and preferably so that it may be adjusted into contact with the screed, as shown in Fig. 12, or--positioned at any suitable distance in advance of the screed, or adjusted to positions above or below the bottom of the screed, or partially above Vand partially below the screed, the various adjustments being illustrated in Figs. 8 to 12.

In the embodiment illustrated in Figs. 1 to 12, inclusive, the vibratory element, which is designated generally by the numeral I3, comprises a central tubular housing I5 having end members I6 threaded to receive the extensions I1.-f The central member I5 carries and houses the vibrating means, which in this case consists of the shaft I8 supported in the end member I6 of the housing I5. The shaft supports an electric motor comprising the core winding I9 on the shaft and the rotor 20 supported on, the bearings 2 I'. The rotor has unbalancing weights 22, so that as the rotor is driven at high speed, high frequency vibrations are s'et up, the vibrations being in an orbital path. It is understood that the scope of movement of the vibratory element is not great, but the imby clips 28. The supporting bars are adjustably mounted on the pedestals 30 which carry pins or studs 3| engageable with the holes 32 in the bars which bear a series of these holes. `The bars may be adjusted to horizontally position the vibratory element relative to the screed, that is, to adjust it to or from the screed. Thebars 24 are arranged in parallel relation so that the position of the vibratory element is maintained and it is capable of resisting a considerable pressure as the machine is advanced, carrying the vibratory element through the concrete.

The vertical position of the vbratory element is maintained and may be varied by'means of the supporting links 33 which are pivoted to the top bars at 34 and connected at the lower ends to the arm 35. This arm is on the rockshaft 36 provided with an adjusting lever 3'! and coacting tooth segment 38.

The electrical connections for the motor are not fully illustrated, but they may be carried down one of the uprights or standards 23, parts thereof being indicated at 39.

With this arrangement of parts, the position of the vibratory element may be widely varied aclcording to particular conditions or as may be the screed, and to accomplish that the vibratory member may be adjusted into contact with the screed as shown in Fig. 12. vWhen that is done, the screed is preferably provided with buiers 40. The vibratory member is arranged parallel with the screed and when vibrated by means of an unbalanced roller, as shown in detail in Figs. 5 and 6, an orbital vibratory movement is set up, the axis of the orbit being parallel With the screed.

In certain of the figures, I illustrate by dotted lines 4| the eiect of this vibratory movement, the vibrations being carried to a very considerable distance in front of the -screed an'd also extending below the screed a considerable extent, even though the vibratory element be considerably in advance of the screed. However, it is to be understood that in all adjustments the vibratory element is relatively close to the screed.

With this arrangement of parts, I am enabled to very effectively place concrete which is commonly designated as an unworkable mix, that is, having a very low water content. Broadly considered, the method is that of my patent on Method of forming and molding concrete, No. 1,787,449, dated January 6, 1931. The present method is an especial adaptation to the placement of concrete slabs and that purpose is a substantial vad- Vance in the art. A

In the modification shown in Figs. 13 and 14, the vibratory member 43 is in the form of a pipe or tube having a central upright 44 thereon connected to the ends of the vibratory member by braces 45. It will be observed that the vibratory member is .of such length that it may be lowered between the forms or, as the screed overhangs the forms, to ride thereon. In this embodiment of Figs. 13 and 14, the vibratory motor 46| having an unbalancing weight 46 is mounted on' the rear side of the upright, the supporting bar 4l being adjustably mounted on the bracket or pedestal 48 as by means of the pivot 49 and the series of holes 50. This bar is adjustably supported by means of the link 5| and the arm 52 on the rockshaft` 53 which is provided with an adjusting lever 54. The vibrating motor 46| is connected to the bar 41 by means of the exible connection 55. The operation is similar to that of the previously described embodiment, but it -does not have certain structural and working advantages which the previously described embodiment has.

With this mechanism and by this method, I

'the high frequency vibrations becoming fluid and workable, so that it may be effectively screeded or smoothed in position.. The vibrations vnot only convert the concrete or change its condition, but they also drive out the air and settle the concrete, and the result is a very high quality slab.

I have illustrated and described my improvements in -very satisfactory embodiments. I have not attempted .to illustrate or describe certain adaptations or modications which I contemplate, or the various uses and adjustments possible, as it is believed that this disclosure will enable those skilled in the art to embody or adap my improvements as may be desired.

Having thus described my invention what I claim as new and desire to secure by-Letters Patent is: l

1. In a machine of the class described, the combination with a screed adapted to support a substantial mass in front thereof as the screed is advanced, of an elongated 'vibratory element, means for supporting said vibratory element in a horizontal position in front of the screed and in parallel relation thereto for advancement with the screed and in an Aentirely submerged relation to the mass of concrete in front of the screed, said vibratory element being supported so as to permit vibration thereof in an orbital path within the mass, means for vertically adjusting said vibratory element on its said supporting means into and out of the mass to be treated and for supporting the same for vibratory movement in its selected adjusted position relative to the screed, and means for vibrating said vibratory element at high frequency in an orbital path simultaneously with its advancing movement and while in its selected adjusted position relative to the screed and while entirely submerged in .the mass in front of the screed.

2. In a machine of the class described, the

combination with a screed adapted to support a vto the mass of concrete in front of the screed,

means for vertically adjusting said vibratory ele-A ment on its said .supporting means into and out of the mass to be treated and for supporting the same ror vibratory movement in its selected adjustes( position relatve to the screed, and means for vibrating said vibratory element at high frequency simultaneously with its advancing movel ment and while in`its selected adjusted position relative to the screed and whileentirely submerged in the mass in front of the screed. A. 3. In a machine .of the class described, the

l.elements relative to the of the mass and for supportingit .bratory element in `mitting its being submerged in or Qzontally in front it in its adjusted position.

aruosa combination with a screed adapted to support a substantial mass at the front of the screed as thev screed is advanced, of an elongated submersible vibratory element, means for supporting said via horizontal position in front of the screed for advancement with the screed and while submerged in the mass in front of the screed, said vibratory element being mounted on its said supporting means topermit the vibratory element to vibrate in an orbital` path, means for adjusting said vibratory element to and from -a submerged position relative to the mass of material in front of the screed and for` supporting it in its adjusted positions, and means for vibrating said vibratory element in an orbital path while submerged in the material infront of the screed. d y 4. In a machine of the class described, the combination with a screed adapted to support a substantial mass of the material to be treated at the front of the screed as the screed is advanced, of an elongated horizontally disposed submersible vibrating element positioned in front of the screed j to act upon the mass supported by the screed, and means for adjustably supporting said vibrating element for advancement with the screed and for vertical adjustment relative to the screed perwithdrawn from the mass in front of said screed and advanced with the 4screed while in submerged position.

5. In a machine o f theclassdescribed, the combination with a screed adapted to support a. substantial mass at the front of the screed as the screed is advanced, of an elongated submersible vibratory element, means for supporting said vi- A bratory element in a horizontal position in front ofl the screed for advancement with the screed and for simultaneous vibration while it is submerged in the mass in front of the screed, and means for vertically and horizontally adjustingsaid vibratory element relative to the screed and for supporting it in its adjustable positions.

6. In a machine of the class described, the combination with a screed adapted to support a substantial mass of the material to be treated in front of the screed as the screed is advanced, of an elongated submersible vibrating element, means for supporting said vibrating element bari- I of the screed for advancement as the screed is advanced, and means for vertically adjusting said vibrating element to a position above and to a position lat least partially below the bottom of the screed and for supporting '1. In a machineof the class described, the combinationwith 4a screed adapted to be advanced against and support as it is advanced a substantial mass of otherwise free material to be treated, of a vibrating element disposed horiaontally infront of said screed and 'in parallel `relation and in such proximity and relation thereto as to be entirely submerged inthe mass of material in supported relation to the screed and means for vertically adjusting said vibrating mass and into and out in its adjusted positions. i l

8 In a machine of the class described, the co bination with a.l screed adapted to be advanced against and support as it is advanced a substantial mass of otherwise free material to be treated, of an elongated submersible vibrating element', means for supporting said vibrating eleto be treated.

ment horizontally 'for advancement in front of the screed as the screed is advanced and submerged within the material in advance of the screed, and means for adjusting said vibrating element vertically relative to the screed and to the mass of material in supported ,relation to the screed and -means 'for supportingv the vibrating element in its adjusted positions.

9. In a machine of the class described, an

elongated submersible vibratory element, means for supporting said vibratory element in a horizontal position for advancement and while entirely submerged in\a mass treated, said vibratory element being supported to permit vibration thereof within the mass in an orbital path, means for supporting said vibratory element for vertical adjustment into and out of Athe mass to be treated and to a selected position of vertical adjustmentrelative thereto, means for supporting said vibrating element in its adjusted positions,` and means for vibrating said vibratory element at high'frequency in an orbital path while in its vertically adjusted po sition and while it is entirely submerged in the mass. Y

10. In a machine of. the class described, an elongated submersiblevibratory element, means for supporting said vibratory element in a horizontal position foradvancement and while en- ,tirely submerged in a mass of material to be treated, said vibratory to permit vibration thereof within the mass. means for supporting said vibratory elementfor vertical adjustment into and out of the mass to be treated and to a selected position of vertical adjustment lin relation thereto, means for supporting sai'd vibrating element in its adjusted positions, and means for vibrating said vibratory element at high frequency while in its vertically adjusted position and while it is entirely submerged'in the mass.

11. In a machine of the class described, an elongated submersible vibratory element, means for supporting said vibratory element in a horizontal position forl vibratory movement in an orbital path and for advancement while entirely submerged in a mass of material to be treated, means for vertically adjusting said vibratory element into andout of the mass to be treated and tg/a selected position of :vertical adjustment in relation thereto, means for supporting saidvibrating element in its adjusted position, andy means for vibrating said vibratory elementat high frequency' in an orbital path while in its selected vertical -adjustmentand while advanced in an entirely submerged ypositionuin the mass of material to be'treated.

12. In a nachine of the class described, an

elongated submersible vibratory element, means for supporting said vibratory element in a horizontallposition for vibratory movement and for advancement while entirely submerged in a mass o'f material to be treated,l means for vertically of material to be adjusting said vibratory element into and out o the mass to be treated and -to aselected position of vertical adjustment in relation thereto', means for supporting said tions, and means for vibrating said vibratory element at high frequency while in its selected vertical adjustment -and'while advanced in an enelement in its adjusted positirely submerged position in the mass of material coawm.. '.rscxsoN. 

